iPhone XR 64g The more I delete the fuller the memory has gotten

Are you using iCloud Photos on your iPhone? If yes, you can not reduce the used local storage any further.

But, you can transfer your photos synced to iCloud and other data which might also sync to iCloud to your computer. After that you can delete the data from iCloud, which will free up some space on your iPhone.

Have a look at the related article:

Archive or make copies of the information you store in iCloud - Apple Support

In case you are not using iCloud Photos, you can copy the photos from your iPhone to your computer and delete them afterwards from your iPhone.

Transfer photos and videos from your iPhone or iPad to your Mac or PC - Apple Support

Also have a look at this related article:

Manage storage on iPhone - Apple Support

System data is taking up ⅔ of your storage space. Back up your data to iCloud, erase your device and restore from backup on iCloud. You can also backup and restore using a Mac and it’s generally faster.